Ask a New Question

Question

Denzal's first 3 scores in math were 90,100,90.

a.what must Denzal score on his fourth test to keep his mean score at 90 or higher?
b.what must Denzal score on his fourth test to keep his median test score at 90 or higher?
14 years ago

Answers

PsyDAG
Mean = Σx/n

90 ≤ (90+100+90+x)/4

Solve for x.

Since median is 50%, any score below 90 will have median of 90. Then 90 will be both median and mode.
14 years ago

Related Questions

Given that math SAT scores are normally distributed (follow the empirical rule) m=500 Standard d... The mean of math SAT scores is 500 and the standard deviation is 100. A random sample of 64 students... The math scores of a math test for five students were posted on the bulletin board. The students' na... the math SAT scores for all students who applied to the school of engineering are normally distribut... Here are the math quiz scores for Student 1 and Student 2. This table presents the math quiz scores... Here are the math test scores of 10 randomly selected students from Class 1 and Class 2. Math Tes... Here are the math test scores of 10 randomly selected students from Class 1 and Class 2. Math Tes... Here are the math test scores of 10 randomly selected students from Class 1 and Class 2. Math Tes... Here are the math quiz scores for Student 1 and Student 2.  This table presents the math quiz sco...
Ask a New Question
Archives Contact Us Privacy Policy Terms of Use